Overview: Daigo Kiryu and Utsusemimaru set out on a journey in pursuit of Uchu King Dagded who invaded Earth. However, during the battle with Dagded, Utsusemimaru is sent to Earth in another time. They arrived on Earth, which has been invaded by the Deboth Army, unable to save the universe from Dagded. In order to stop the ruined future, they head back to the original timeline, but due to the changes in the timeline, Uchu King Gira reigns over Chikyuu!
Overview: Nobody knows where they came from. They parasitize in human beings, take control of them and change their bodies into hideous monsters (Necro-borg). The Necro-borg fight each other until the other dies. Where did they come from? To what end? Yuji and Kaoru, whom both have dark secrets within themselves, get caught up in the horrific battles of Necro-borg. What will their fate be?